🙅 Bind a WebAPK to its "host" browser.

web_apks/minting_example/src/org/chromium/minting/MintingServiceFactory.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.minting;
 
 import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
 import android.os.IBinder;
 import android.util.Log;
 
+import org.chromium.minting.lib.common.WebAPKUtils;
+
 import java.io.File;
 import java.lang.reflect.Constructor;
 
 /**
  * Shell class for services provided by Web APK to Chrome. Extracts code with implementation of
  * services from .dex file in Chrome APK.
  */
 public class MintingServiceFactory extends Service {
     private static final String TAG = "cr.MintingServiceFactory";
 
     /**
      * Name of the class with IBinder API implementation.
      */
     private static final String MINTED_SERVICE_IMPL_CLASS_NAME =
             "org.chromium.minting.MintedServiceImpl";
 
     /**
      * ClassLoader for loading {@link MINTED_SERVICE_IMPL_CLASS_NAME}. Static so that all
      * {@link MintingServiceFactory} service instatiations use the same ClassLoader during the app's
      * lifetime.
      */
     private static ClassLoader sClassLoader;
 
     @Override
     public IBinder onBind(Intent intent) {
         if (sClassLoader == null) {
-            String remotePackageName =
-                    getSharedPreferences(MintingApplication.MINT_PREFS, MODE_PRIVATE)
-                            .getString(MintingApplication.HOST_PACKAGE_PREF,
-                                    MintingApplication.DEFAULT_CHROME_PACKAGE_NAME);
-            Context remoteContext = DexLoader.getRemoteContext(this, remotePackageName);
+            Context remoteContext = WebAPKUtils.getHostBrowserContext(this);
             if (remoteContext == null) {
                 Log.w(TAG, "Failed to get remote context.");
                 return null;
             }
 
             File remoteDexFile =
                     new File(remoteContext.getDir("dex", Context.MODE_PRIVATE), "web_apk.dex");
             File localDexDir = getDir("dex", Context.MODE_PRIVATE);
             sClassLoader = DexLoader.load(remoteContext, "web_apk.dex",
                     MINTED_SERVICE_IMPL_CLASS_NAME, remoteDexFile, localDexDir);
             if (sClassLoader == null) {
                 Log.w(TAG, "Unable to load web APK dex.");
                 return null;
             }
         }
 
         try {
             Class<?> mintedServiceImplClass =
                     sClassLoader.loadClass(MINTED_SERVICE_IMPL_CLASS_NAME);
-            Constructor mintedServiceImplConstructor =
+            Constructor<?> mintedServiceImplConstructor =
                     mintedServiceImplClass.getConstructor(Context.class, int.class);
             return (IBinder) mintedServiceImplConstructor.newInstance(new Object[] {this,
                     R.drawable.app_icon});
         } catch (Exception e) {
             Log.w(TAG, "Unable to create MintedServiceImpl");
             e.printStackTrace();
             return null;
         }
     }
 }